Abstract: The unique features of wireless mesh network (WMN) such as unpredictable link properties and hidden and exposed terminal problems make the quality of services (QoS) control over WMNs more challenging. This paper presents a survey on the state-of-the-art WMN QoS control. First, layered QoS support strategies are analyzed. Then, several approaches of cross-layer QoS design for WMNs are introduced and analyzed. Open issues and further research topics are suggested.